<template>
  <div class="permission-container">
    <div class="app-container">
      <!-- 表格 -->
      <el-card>
        <div style="text-align: right; margin-bottom: 20px">
          <el-button type="primary" size="small" @click="hAdd(1, '0')">添加权限</el-button>
        </div>
        <el-table :data="list" row-key="id">
          <el-table-column label="名称" prop="name" />
          <el-table-column label="标识" prop="code" />
          <el-table-column label="描述" prop="description" />
          <el-table-column label="操作">
            <template v-slot="{row}">
              <!-- 子列表的type为2 子列表不显示添加 -->
              <!-- 表格中添加的子目录pid应该为当前点击选项的id -->
              <el-button v-if="row.type === 1" type="text" @click="hAdd(2,row.id)">添加</el-button>
              <el-button type="text" @click="hEdit(row.id)">编辑</el-button>
              <el-button type="text" @click="hDel(row.id)">删除</el-button>
            </template>
          </el-table-column>
        </el-table>
      </el-card>
    </div>

    <!-- 表单弹窗内容 -->
    <el-dialog
      :visible.sync="showDialog"
      :title="isEdit? '编辑' : '添加'"
      @close="resetForm"
    >
      <el-form ref="form" :model="formData" :rules="rules" label-width="100px">
        <el-form-item label="权限名称" prop="name">
          <el-input v-model="formData.name" />
        </el-form-item>
        <el-form-item label="权限标识" prop="code">
          <el-input v-model="formData.code" />
        </el-form-item>
        <el-form-item label="权限描述" prop="description">
          <el-input v-model="formData.description" />
        </el-form-item>
        <el-form-item label="权限启用">
          <el-switch
            v-model="formData.enVisible"
            active-text="启用"
            active-value="1"
            inactive-text="不启用"
            inactive-value="0"
          />
        </el-form-item>
      </el-form>

      <template #footer>
        <div style="text-align: right;">
          <el-button @click="showDialog = false">取消</el-button>
          <el-button type="primary" @click="hSubmit">确定</el-button>
        </div>
      </template>
    </el-dialog>
  </div>
</template>

<script>
import { addPermission, delPermission, getPermissionDetail, getPermissionList, updatePermission } from '@/api/permissions'
import { tranListToTreeData } from '@/utils'
export default {
  data() {
    const validCode = (rule, value, callback) => {
      let codeList = this.originList
      if (this.isEdit) {
        codeList = this.originList.filter(item => item.id !== this.formData.id)
      }
      codeList.map(item => item.code).includes(value) ? callback(new Error(value + '已占有')) : callback()
    }
    const validName = (rule, value, callback) => {
      let nameList = []
      if (this.isEdit) {
        nameList = this.originList.filter(item => item.pid === this.formData.pid && item.id !== this.formData.pid)
      }
      nameList.map(item => item.name).includes(value) ? callback(new Error(value + '已占有')) : callback()
    }
    return {
      list: [],
      originList: [],
      isEdit: false,
      showDialog: false, // 是否显示弹层
      formData: {
        name: '', // 名称
        code: '', // 权限标识
        description: '', // 描述
        enVisible: '0', // 开启
        pid: '', // 添加到哪个节点下
        type: '' // 类型
      },
      rules: {
        code: [{ message: '不能为空', required: true, trigger: 'blur' },
          { validator: validCode, trigger: 'blur' }],
        name: [{ message: '不能为空', required: true, trigger: 'blur' },
          { validator: validName, trigger: 'blur' }]
      }
    }
  },
  created() {
    this.loadPermissionList()
  },
  methods: {
    async loadPermissionList() {
      try {
        const res = await getPermissionList()
        // 将扁平数据转换成树状结构
        this.originList = res.data.map(({ id, pid, name, code }) => ({ id, pid, name: name.trim(), code }))
        this.list = tranListToTreeData(res.data)
      } catch (e) {
        console.log(e)
      }
    },
    hAdd(type, pid) {
      // console.log(type, pid)
      this.showDialog = true
      this.isEdit = false
      // 将 type, pid 传入要添加的子集 表单中
      this.formData.pid = pid
      this.formData.type = type
    },
    async hSubmit() {
      const valid = await this.$refs.form.validate()
      if (!valid) return
      let res = null
      if (this.isEdit) {
        res = await updatePermission(this.formData)
      } else {
        res = await addPermission(this.formData)
      }
      try {
        // console.log(res)
        this.$message.success(res.message)
        this.showDialog = false
        this.loadPermissionList()
      } catch (e) {
        this.$message.error(e.message)
      }
    },
    resetForm() {
      this.formData = {
        name: '', // 名称
        code: '', // 权限标识
        description: '', // 描述
        enVisible: '0', // 开启
        pid: '', // 添加到哪个节点下
        type: '' // 类型
      }
      this.$refs.form.resetFields()
    },
    async hDel(id) {
      await this.$confirm('您确定要删除吗?', '提示', { type: 'warning' }).catch(e => e)
      try {
        const res = await delPermission(id)
        this.loadPermissionList()
        this.$message.success(res.message)
      } catch (e) {
        this.$message.error(e.message)
      }
    },
    async hEdit(id) {
      this.isEdit = true
      const res = await getPermissionDetail(id)
      this.formData = res.data
      this.showDialog = true
    }
  }
}
</script>
